Classes which are arranged in a circle make quite a strong statement about what the teacher and the students believe in. With all the people in the room sitting in a circle, there is a far greater feeling of equality than when the teacher stays out at the front. This may not be quite so true of the horseshoe shape, where the teacher is often located in a commanding position, but, even here, the rigidity that comes with orderly rows, for example, is lessened.

      With the horseshoe and circle seating, the classroom is a more intimate place and the potential for students to share feelings and information through talking, eye contact or expressive body movements (eyebrow-raising, shouldershrugging, etc.) is far greater than when they are sitting in rows.

                                      (Harmer, J. The practice of English language teaching. 2007)

      Classes which are arranged in a circle make quite a strong statement about what the teacher and the students believe in. With all the people in the room sitting in a circle, there is a far greater feeling of equality than when the teacher stays out at the front. This may not be quite so true of the horseshoe shape, where the teacher is often located in a commanding position, but, even here, the rigidity that comes with orderly rows, for example, is lessened.

      With the horseshoe and circle seating, the classroom is a more intimate place and the potential for students to share feelings and information through talking, eye contact or expressive body movements (eyebrow-raising, shouldershrugging, etc.) is far greater than when they are sitting in rows.

                                      (Harmer, J. The practice of English language teaching. 2007)

      Classes which are arranged in a circle make quite a strong statement about what the teacher and the students believe in. With all the people in the room sitting in a circle, there is a far greater feeling of equality than when the teacher stays out at the front. This may not be quite so true of the horseshoe shape, where the teacher is often located in a commanding position, but, even here, the rigidity that comes with orderly rows, for example, is lessened.

      With the horseshoe and circle seating, the classroom is a more intimate place and the potential for students to share feelings and information through talking, eye contact or expressive body movements (eyebrow-raising, shouldershrugging, etc.) is far greater than when they are sitting in rows.

                                      (Harmer, J. The practice of English language teaching. 2007)

1. What is an analog-digital converter?

An Analog-Digital Converter (ADC) is a widely used electronic component that converts an analog electric signal (usually a voltage) into a digital representation. The ADCs are at the front-end of any digital circuit that needs to process signals coming from the exterior world. Its schematic symbol is:

The output of a microphone, the voltage at a photodiode or the signal of an accelerometer are examples of analog values that need to be converted so that a microprocessor can work with them.

2. How does the ADC convert a signal?

Many ways have been developed to convert an analog signal, each with its strengths and weaknesses. The choice of the ADC for a given application is usually defined by the requirements you have: if you need speed, use a fast ADC; if you need precision, use an accurate ADC; if you are constrained in space, use a compact ADC.

All ADCs work under the same principle: they need to convert a signal to a certain number of bits N. The sequence of bits represents the number and each bit has the double of the weight of the next, starting from the Most Significant Bit (MSB) up to the Least Significant Bit (LSB). In a nutshell, we want to find the sequence of bits bN−1, bN−2, ..., b0 that represents the analog value Vin as Vin=∑n=0N−1bn2nVref2N.

                                (www.onmyphd.com/?p=analog.digital.converter. Adaptado)

1. What is an analog-digital converter?

An Analog-Digital Converter (ADC) is a widely used electronic component that converts an analog electric signal (usually a voltage) into a digital representation. The ADCs are at the front-end of any digital circuit that needs to process signals coming from the exterior world. Its schematic symbol is:

The output of a microphone, the voltage at a photodiode or the signal of an accelerometer are examples of analog values that need to be converted so that a microprocessor can work with them.

2. How does the ADC convert a signal?

Many ways have been developed to convert an analog signal, each with its strengths and weaknesses. The choice of the ADC for a given application is usually defined by the requirements you have: if you need speed, use a fast ADC; if you need precision, use an accurate ADC; if you are constrained in space, use a compact ADC.

All ADCs work under the same principle: they need to convert a signal to a certain number of bits N. The sequence of bits represents the number and each bit has the double of the weight of the next, starting from the Most Significant Bit (MSB) up to the Least Significant Bit (LSB). In a nutshell, we want to find the sequence of bits bN−1, bN−2, ..., b0 that represents the analog value Vin as Vin=∑n=0N−1bn2nVref2N.

                                (www.onmyphd.com/?p=analog.digital.converter. Adaptado)

1. What is an analog-digital converter?

An Analog-Digital Converter (ADC) is a widely used electronic component that converts an analog electric signal (usually a voltage) into a digital representation. The ADCs are at the front-end of any digital circuit that needs to process signals coming from the exterior world. Its schematic symbol is:

The output of a microphone, the voltage at a photodiode or the signal of an accelerometer are examples of analog values that need to be converted so that a microprocessor can work with them.

2. How does the ADC convert a signal?

Many ways have been developed to convert an analog signal, each with its strengths and weaknesses. The choice of the ADC for a given application is usually defined by the requirements you have: if you need speed, use a fast ADC; if you need precision, use an accurate ADC; if you are constrained in space, use a compact ADC.

All ADCs work under the same principle: they need to convert a signal to a certain number of bits N. The sequence of bits represents the number and each bit has the double of the weight of the next, starting from the Most Significant Bit (MSB) up to the Least Significant Bit (LSB). In a nutshell, we want to find the sequence of bits bN−1, bN−2, ..., b0 that represents the analog value Vin as Vin=∑n=0N−1bn2nVref2N.

                                (www.onmyphd.com/?p=analog.digital.converter. Adaptado)

1. What is an analog-digital converter?

An Analog-Digital Converter (ADC) is a widely used electronic component that converts an analog electric signal (usually a voltage) into a digital representation. The ADCs are at the front-end of any digital circuit that needs to process signals coming from the exterior world. Its schematic symbol is:

The output of a microphone, the voltage at a photodiode or the signal of an accelerometer are examples of analog values that need to be converted so that a microprocessor can work with them.

2. How does the ADC convert a signal?

Many ways have been developed to convert an analog signal, each with its strengths and weaknesses. The choice of the ADC for a given application is usually defined by the requirements you have: if you need speed, use a fast ADC; if you need precision, use an accurate ADC; if you are constrained in space, use a compact ADC.

All ADCs work under the same principle: they need to convert a signal to a certain number of bits N. The sequence of bits represents the number and each bit has the double of the weight of the next, starting from the Most Significant Bit (MSB) up to the Least Significant Bit (LSB). In a nutshell, we want to find the sequence of bits bN−1, bN−2, ..., b0 that represents the analog value Vin as Vin=∑n=0N−1bn2nVref2N.

                                (www.onmyphd.com/?p=analog.digital.converter. Adaptado)

                                         Knowledge and the library

      It was not until the development of monastic libraries in Europe around 1200 that humanity amassed in a single place what approached the collective wisdom and knowledge of the age. Libraries may be exchanges of information and market places for ideas but they are also the buildings which contain the bulk of human knowledge. Or, at least they were until the electronic digitally stored information revolution of the 1980s.

      Now knowledge is virtually everywhere; it has broken free of the constraint of buildings. Today if you were today to destroy all the world’s libraries, it is unlikely that more than 20% of human knowledge would be lost. Certainly, a large amount of archival material would disappear forever, but a substantial volume of knowledge would survive. If a library is a repository of knowledge, this is now just one of its functions. The library’s prime function is now making that knowledge available and encouraging exchange and reflection upon it.

      Electronic knowledge is nowadays available to everybody – in the home, workplace, airport terminal, school, and so on. The Internet has liberated the library; nevertheless, it has not removed the justification for library facilities.

                 (www.sciencedirect.com/science/article/pii/B978185617619410017X. Adaptado)

                                         Knowledge and the library

      It was not until the development of monastic libraries in Europe around 1200 that humanity amassed in a single place what approached the collective wisdom and knowledge of the age. Libraries may be exchanges of information and market places for ideas but they are also the buildings which contain the bulk of human knowledge. Or, at least they were until the electronic digitally stored information revolution of the 1980s.

      Now knowledge is virtually everywhere; it has broken free of the constraint of buildings. Today if you were today to destroy all the world’s libraries, it is unlikely that more than 20% of human knowledge would be lost. Certainly, a large amount of archival material would disappear forever, but a substantial volume of knowledge would survive. If a library is a repository of knowledge, this is now just one of its functions. The library’s prime function is now making that knowledge available and encouraging exchange and reflection upon it.

      Electronic knowledge is nowadays available to everybody – in the home, workplace, airport terminal, school, and so on. The Internet has liberated the library; nevertheless, it has not removed the justification for library facilities.

                 (www.sciencedirect.com/science/article/pii/B978185617619410017X. Adaptado)

                                         Knowledge and the library

      It was not until the development of monastic libraries in Europe around 1200 that humanity amassed in a single place what approached the collective wisdom and knowledge of the age. Libraries may be exchanges of information and market places for ideas but they are also the buildings which contain the bulk of human knowledge. Or, at least they were until the electronic digitally stored information revolution of the 1980s.

      Now knowledge is virtually everywhere; it has broken free of the constraint of buildings. Today if you were today to destroy all the world’s libraries, it is unlikely that more than 20% of human knowledge would be lost. Certainly, a large amount of archival material would disappear forever, but a substantial volume of knowledge would survive. If a library is a repository of knowledge, this is now just one of its functions. The library’s prime function is now making that knowledge available and encouraging exchange and reflection upon it.

      Electronic knowledge is nowadays available to everybody – in the home, workplace, airport terminal, school, and so on. The Internet has liberated the library; nevertheless, it has not removed the justification for library facilities.

                 (www.sciencedirect.com/science/article/pii/B978185617619410017X. Adaptado)

                                         Knowledge and the library

      It was not until the development of monastic libraries in Europe around 1200 that humanity amassed in a single place what approached the collective wisdom and knowledge of the age. Libraries may be exchanges of information and market places for ideas but they are also the buildings which contain the bulk of human knowledge. Or, at least they were until the electronic digitally stored information revolution of the 1980s.

      Now knowledge is virtually everywhere; it has broken free of the constraint of buildings. Today if you were today to destroy all the world’s libraries, it is unlikely that more than 20% of human knowledge would be lost. Certainly, a large amount of archival material would disappear forever, but a substantial volume of knowledge would survive. If a library is a repository of knowledge, this is now just one of its functions. The library’s prime function is now making that knowledge available and encouraging exchange and reflection upon it.

      Electronic knowledge is nowadays available to everybody – in the home, workplace, airport terminal, school, and so on. The Internet has liberated the library; nevertheless, it has not removed the justification for library facilities.

                 (www.sciencedirect.com/science/article/pii/B978185617619410017X. Adaptado)

The real reason Apple and Google want you to use your phone less

                                         NIR EYAL MAY 19, 2019

If tech is “hijacking your brain” with their “irresistible” products, as some tech critics claim, why are these companies now acting against their own interests?

      This week Apple follows Google by announcing features to help people cut back on their tech use. Why would the companies that make your phone want you to use it less? If tech is “hijacking your brain” with their “irresistible” products, as some tech critics claim, why are these companies now acting against their own interests? Perhaps the tech giants have had a change of heart or have been persuaded by public pressure to change their ways? Hardly. I studied the sophisticated psychology these companies deploy to keep people hooked and wrote a book about how they do it. At first glance, it appears their business model would benefit from addiction. The more you use your phone, the more money they make through the apps you buy and the ads you view.

      However, the addiction story falls short when considering the long-term interests of these companies. Apple and Google are making it easier for consumers to cut back on phone use because it is in their interest to do so. In this case, what’s good for the user is also good for these companies’ bottom lines. Apple and Google don’t want you to get addicted. Addiction is a compulsive harmful behavior. Rather, they’d prefer you form healthy habits with your digital devices.

      Consider why you wear a seatbelt. In 1968, the Federal Government mandated that seat belts come equipped in all cars. However, nineteen years before any such regulation, American car makers started offering seat belts as a feature. The laws came well after car makers started offering seatbelts because that’s what consumers wanted. Car makers who sold safer cars sold more.

      Similarly, thousands of third-party apps have given smartphone owners ways to moderate tech use with tools to help them monitor how much time they spend online, turn off access to certain sites, and reduce digital distraction — tools very similar to what Apple and Google recently announced. I started writing about this burgeoning trend, in what I called “attention retention” devices, back in early 2015 and today there are more digital wellness products than ever.

       As they often do with successful apps built on their platforms, Apple and Google took note of what consumers wanted and decided to incorporate these features as standard — just as car makers did with seat belts in the 1950s. They also went beyond what app makers can do by adding features only the operating system makers can offer, like batch notifications to reduce the frequency of intraday interruptions and the ability to put the phone in “shush” mode by flipping it over.

      The history of innovation is littered with examples of new technologies causing unintended harm. As cultural theorist Paul Virilio said, “When you invent the ship, you also invent the shipwreck.” Although the devices these modern shipbuilders make certainly have potential negative consequences, like overuse, it’s also in their interests to make their products less harmful.

      With few exceptions, when a product harms people, consumers tend to use it less often or find better alternatives. The feature fight between these two tech rivals benefits everyone. The move to help users create healthy habits with their devices is an example of competition making products better.

       Although they are certainly designed to be persuasive and user-friendly, we aren’t slaves to our technologies and it behooves us to stop thinking we’re powerless. The tech companies are taking steps to help users rein in device overuse. Now it’s our turn to put these features to use, buckle down, and buckle up

(Available in: https://www.theladders.com/career-advice/the-reason-apple-and-google-want-you-to-use-your-phone-less. Accessed on May 19th, 2019. Adapted.)